staging: comedi: addi_apci_2032: fix i_APCI2032_ReadWatchdog()

This function is used by the watchdog subdevice to read the status of
the watchdog. Rename the CamelCase function to apci2032_wdog_insn_read
and fix the function to return the status value insn->n times like
the comedi core expects.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>